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Steel Seamless Pipe Production Line. Hot Metal Tubes. Heavy Industry. Metal tube production line at metal factory. Hot steel pipe production line. Steel seamless pipe production process. Red hot metal

视  频 ID：  1046459905
版      权：  hasky2
视频长度：  0:10
横纵比率：  1.90:1
所属分类：  人物 工业 
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